Wellington City Council is encouraging the public to report any tacks they come across on the city's cycleways.
Several cyclists have taken to social media over the weekend to report tacks being laid on cycleways around Cambridge Terrace and Evans Bay.
A Wellington City Council spokesperson said the council was aware of the reports.
"This is a very serious issue, not only for costs to repair a tyre, but the big issue here is safety, especially as these cycleways are used by young children and parents with toddlers."
The spokesperson said a cyclist who got a flat tyre caused by a tack while travelling at speed faced the risk of serious injury.
"Offenders could face fines or prosecution. We encourage the public to report it immediately to our contact centre on 499 4444 so they can arrange for contractors to sweep the site, and for it to be included in reports to police."
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